Ubuntu 18.04下安装R包rjsoncons遇cpp11库writable歧义错误

解决步骤 #

• 降级cpp11包到0.4.5版本：

  # 查看当前cpp11版本
  packageVersion("cpp11")
  # 卸载当前版本
  remove.packages("cpp11")
  # 安装兼容版本
  install.packages("cpp11", version = "0.4.5")
  

• 重新安装rjsoncons：

  install.packages("rjsoncons", repos = "https://CRAN.R-project.org")
  

错误原因 #

编译错误核心是cpp11库中writable命名空间存在歧义：新版本cpp11在declarations.hpp中添加了namespace writable = ::cpp11::writable;的别名，同时r_vector.hpp中本身定义了cpp11::writable命名空间，导致编译器无法确定代码中引用的writable指向哪个。而rjsoncons 1.2.0的代码未适配cpp11的这个命名空间变化，因此降级cpp11到未引入该别名的0.4.5版本即可解决问题。

原始错误日志 #

**Installing package into ‘/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3’
**# (as ‘lib’ is unspecified)
**trying URL 'https://CRAN.R-project.org/src/contrib/rjsoncons_1.2.0.tar.gz'
Content type 'application/x-gzip' length 578073 bytes (564 KB)
**# ==================================================**
**downloaded 564 KB

* installing *source* package ‘rjsoncons’ ...
** package ‘rjsoncons’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0’
g++ -std=gnu++17 -I"/usr/share/R/include" -DNDEBUG -I../inst/include/ -I'/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include'     -fpic  -g -O2 -fdebug-prefix-map=/build/r-base-WnOgSi/r-base-4.3.3=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2  -c cpp11.cpp -o cpp11.o
g++ -std=gnu++17 -I"/usr/share/R/include" -DNDEBUG -I../inst/include/ -I'/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include'     -fpic  -g -O2 -fdebug-prefix-map=/build/r-base-WnOgSi/r-base-4.3.3=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2  -c rjsoncons.cpp -o rjsoncons.o
In file included from rjsoncons.cpp:8:0:
j_as.h: In function ‘cpp11::sexp as_r(Json)’:
j_as.h:165:22: error: reference to ‘writable’ is ambiguous
             result = writable::list(j.size()); // default: NULL elements
                      ^~~~~~~~
In file included from rjsoncons.cpp:1:0:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:14:39: note: candidates are: namespace writable = cpp11::cpp11::writable;
 namespace writable = ::cpp11::writable;
                                       ^
In file included from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/list.hpp:10:0,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/data_frame.hpp:12,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11.hpp:7,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:13,
                 from rjsoncons.cpp:1:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/r_vector.hpp:44:11: note:                 namespace cpp11::writable { }
 namespace writable {
           ^~~~~~~~
In file included from rjsoncons.cpp:8:0:
j_as.h:169:22: error: parse error in template argument list
             result = j_as_r_vector<writable::logicals, bool>(j);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
j_as.h:173:22: error: parse error in template argument list
             result = j_as_r_vector<writable::integers, int32_t>(j);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
j_as.h:177:22: error: parse error in template argument list
             result = j_as_r_vector<writable::doubles, double>(j);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
j_as.h:181:22: error: parse error in template argument list
             result = j_as_r_vector<writable::strings, std::string>(j);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
j_as.h:186:13: error: reference to ‘writable’ is ambiguous
             writable::list value(j.size());
             ^~~~~~~~
In file included from rjsoncons.cpp:1:0:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:14:39: note: candidates are: namespace writable = cpp11::cpp11::writable;
 namespace writable = ::cpp11::writable;
                                       ^
In file included from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/list.hpp:10:0,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/data_frame.hpp:12,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11.hpp:7,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:13,
                 from rjsoncons.cpp:1:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/r_vector.hpp:44:11: note:                 namespace cpp11::writable { }
 namespace writable {
           ^~~~~~~~
In file included from rjsoncons.cpp:8:0:
j_as.h:188:67: error: ‘value’ was not declared in this scope
                 j.array_range().cbegin(), j.array_range().cend(), value.begin(),
                                                                   ^~~~~
j_as.h:188:67: note: suggested alternative: ‘valloc’
                 j.array_range().cbegin(), j.array_range().cend(), value.begin(),
                                                                   ^~~~~
                                                                   valloc
j_as.h:196:9: error: reference to ‘writable’ is ambiguous
         writable::list value(j.size());
         ^~~~~~~~
In file included from rjsoncons.cpp:1:0:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:14:39: note: candidates are: namespace writable = cpp11::cpp11::writable;
 namespace writable = ::cpp11::writable;
                                       ^
In file included from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/list.hpp:10:0,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/data_frame.hpp:12,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11.hpp:7,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:13,
                 from rjsoncons.cpp:1:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/r_vector.hpp:44:11: note:                 namespace cpp11::writable { }
 namespace writable {
           ^~~~~~~~
In file included from rjsoncons.cpp:8:0:
j_as.h:197:9: error: reference to ‘writable’ is ambiguous
         writable::strings names(j.size());
         ^~~~~~~~
In file included from rjsoncons.cpp:1:0:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:14:39: note: candidates are: namespace writable = cpp11::cpp11::writable;
 namespace writable = ::cpp11::writable;
                                       ^
In file included from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/list.hpp:10:0,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/data_frame.hpp:12,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11.hpp:7,
                 from /home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/declarations.hpp:13,
                 from rjsoncons.cpp:1:
/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/cpp11/include/cpp11/r_vector.hpp:44:11: note:                 namespace cpp11::writable { }
 namespace writable {
           ^~~~~~~~
In file included from rjsoncons.cpp:8:0:
j_as.h:202:13: error: ‘names’ was not declared in this scope
             names[i] = it->key();
             ^~~~~
j_as.h:203:13: error: ‘value’ was not declared in this scope
             value[i] = as_r(it->value());
             ^~~~~
j_as.h:206:9: error: ‘value’ was not declared in this scope
         value.names() = names;
         ^~~~~
j_as.h:206:25: error: ‘names’ was not declared in this scope
         value.names() = names;
                         ^~~~~
/usr/lib/R/etc/Makeconf:200: recipe for target 'rjsoncons.o' failed
make: *** [rjsoncons.o] Error 1
ERROR: compilation failed for package ‘rjsoncons’
* removing ‘/home/ignatius/R/x86_64-pc-linux-gnu-library/4.3/rjsoncons’

The downloaded source packages are in
    ‘/tmp/Rtmppa0z3X/downloaded_packages’
Warning message:
In install.packages("rjsoncons", repos = "https://CRAN.R-project.org") :
  installation of package ‘rjsoncons’ had non-zero exit status

内容的提问来源于stack exchange，提问作者Ignatius Pang